Link-making machine



(No Model.) 3 Sheets-Sheet 1.

J. I. GHEESMAN;

LINK MAKING MACHINE.

n 0. KW m Wm/w .mw 2 w 4 M D m M J y w M m P M m y B M 4 3 S. 3 .H 3 W0| I N w Q N PETERS, Fhalo-Lilhogmpher. Wflsllinghlm D4 C.

(No Model.) 3 SheetsSh eet 2.

' J. I. OHEESMAN.

LINK MAKING MACHINE.

No. 332,993. H ntqd Dec. 22, 1885.

' I F719 l 1' INVENTOR (76012 es .Z. 672668772617? @1 Q W By kisflttorney N. PETERS. Plmlo'lilhognpher. Wishing'un. n. c.

(No Model.) 3 Sheets-Sheet 3. J. I. CHEESMAN.

LINK MAKING MACHINE.

Patented Dec. 22, 1885.

INVENTOR James I. Cizeesman By 7221s .dttorney ll d m & M V S m F. m N T7 I W N. PETERS, mmxouaho m m. Waihinglon. D c.

llama Tarts FFE PATENT LINK-MAKING MACHINE.

SPECIFICATION forming partof Letters Patent No. 332,993, dated December22, 1885.

Application filed May '27, 1585. Serial No. 166,885. (No model.)

I?) all whom it may concern:

EiBe it known that 1, JAMES ;I. CHEESMAN, a

I citizen of the United States, residing at Alnation of parts forperforming the several opor handling the blank between the bendingandwelding operations.

The present invention consists more particularly, first, in a novelcombination of parts for bending the straight rod or bar blank into Ushape; secondly, into a novel combination of parts for holding the bentblank while its.

ends are lapped for welding; thirdly,rin a novel combination of partsfor lapping the ends of the blank by motion transmitted from the hammerduring its descent; fourthly, in a novel combination of parts forshifting the welded link upward by hand preparatory to the finishingoperation; fifthly, 'in a 1mm combination of parts for imparting asmooth finish to the weld in the machine by hammering in the fins orlateral swells formed at the welding operation; sixthly, in a novelcombination of parts whereby the finished link is again elevated, and isloosely held in a convenient position for withdrawal from t he machinewhen the machine is brought to its position of rest; seventhly, in anovel combierations which complete the link independent of the means bywhich the same are actuated; eighthly, in a novel combination of partsfor automatically unclutching the main shaft of the machine from a loosedriving-pulley at the end of each bending-stroke; ninthly, in a similarcombination of parts for automatically unclutching said shaft from saidpulley at the end of each return-stroke of the bending-slide; and,tenthly, in a combined bending-mandrel and welding anvil which collapsesin a pc- ,culiar manner to release the welded link, as

hereinafter set forth.

Three sheets of drawings accompany this specification as part thereof.

Figures 1 and 2 of the drawings represent, respectively, a frontelevation and a side View of my link bending and welding machine in itscondition of rest.

Fig.3 represents afront" elevation of thesame, partly in section, on themer and other parts in three positions, by full,

broken, and dotted lines respectively, and illustrating the end lappingand welding operations. Fig. 5 represents a front view of that portionof the machine immediately below its waist, partly in section,illustrating the shifting of the link preparatory to the finishingoperation. Fig. 6 represents a vertical section of the machine in theplane indicated at 6 6, Fig. 5, illustrating said finishing operation.Fig. 7 represents a similar view of the upper part of the machinerestored to rest, with the finished link hanging loosely on thewelding-anvil, ready for removal from the machine. Fig. 8 represents ahorizontal section in the plane indicated at 8 8, Fig. 7, and a planview of the parts immediately below the plane of section. Fig. 9 isaback view of the mandrelslide shown in the preceding figures, and

Fig. 10 is a sect-ion on the line 0 0, Fig. '9.

' Like letters of reference indicate corre-' sponding parts in theseveral figures.

An upright frame, A, with a base-plate, B, and a pedestal, O, on thelatter parallel with the sides of the frame, support the working partsof the machine, including, preferably, an elevated horizontaldriving-shaft, D, parallel with the face of the machine, instead ofwhich a convenient section of line-shafting, or a counter-shaft distinctfrom the machine, may be used. uprights of said frame A vertical ways ww are formed, and in the lower portion of said waysw and said ways w thesaid mandrel-slide,

In and on the inner surfaces of the- Figs. 9 and 10, shown at S in theother figures, with the cross-head X of its rod part, work" freely upand down. Said slide S, with the mandrel proper on its face, is in twoparts, as clearly shown in the several face views, and in Figs. 9 and10, to which reference is made for all details, the mandrel proper beingdivided horizontally into equal or nearly equalsectionsm m, carried,respectively, by the upper part of the slide and its rod part, whichcarries said cross head X. The upper end ofsaid rod part works in avertical slot, 5, in said upper part of the slide, and is provided witha pulling cross-head, w, and said upper part of the slide is provided onits back, Fig. 9, with strong shoulder projections s s ,to engage withsaid crosshead 00, said slot 8 being extended to the lower edge of saidupper part of the slide to avoid weakening. the rod part. The lowermandrel-section, m, is strongly attached to the upper extremity of therod part by through-bolts. The upper mandrel-section,m, may be cast 011the face of the upper part of the slide. or attached thereto in anyapproved way. The lower extremity of said rod part of the slide Sisconnected by a pitman, P, with a crank-wheel, W, between the lower endsof the uprights of said frame A, which crank-wheel is carried by theinner end of a main shaft, M. the outer end of which is mounted in abearing on said pedestal O. This shalt is provided centrally with aloose driving-pulley, L, which is connected by a driving-band, F, Figs.land 2, and pulley E with said driving-shaft D. Rotary motion is thustransmitted continuously to said pulley L. v

For transmitting motion to the main shaft M for lowering andre-elevating said mandrelslide S, a pair of clutch-slides, (J C", aremounted on splint-d portions of said main shalt, and clutchprojections ab are formed on the respective sides of said pulley L, toengagewiththerespectiveclutch-slides. Handlevers H H are connected withforks FtF", for engaging the respective clutchslides, thelatterdirectly, (by-apivot pin orbolt,) and said 'hand-lever H, throughthe medium of a supplemental lever, L, and a horizontal slide-bar, S, asshown, the several parts being appropriately fulcrumed and coupledtogether. Short horizontal tappet-slides T T", for disengaging therespective clutch-slides automatically at the respective ends of thestroke of said mandrel-slide, are coupled with said lever L and saidfork F", respectively, by the pivots which connect therewith saidhandlevers, and corresponding cam-surfaces,c c,are formed on therespective ends of the cross-head X, to coact with the inner ends ofsaid tappet'slides.

In the state of rest (represented in Figs. 1, 2, and .7) saidmandrel-slide S is in its uppermost position, and the mandrel m m"projects in front of arecessed face portion, r, of the frameuprights.Near the lower extremity of this recessed portion a. pair offeed-rollers, f f, are mounted on short studshafts which project fromthe respective uprights parallel to the sides of the mandrel, the planeof the tops of'these rollers being a short distance below the lower endof the elevated mandrel, so that a straight linkblank, Z, may beadjusted upon I said rollers beneath the mandrel, as shown in Fig. 1.Immediately below this point said uprights of the frame A projectforward sufficientl y to accommodate in front of the plane of themadrel-slide certain parts which will now be described. An inner frame,I, in connection with the uprights of said frame A, partly incloses apair of clamping-jaws, J J, having opposing inner faces, and pivoted attheir lower ends, as shown in Fig. 3, upon the sill of said frame I.

Normally the jaws J stand in. retracted position, as indicated in Fig.1, and in full lines in Fig. 3. For forcing them inward to clamp thelink-blankl after ithas been bent to U shape, as represented in Fig. 4,and by dotted lines in Fig. 3, a sliding outer frame, 0, composed of abottom cross-bar and two uprights, embraces said inner frame, I, whichis of-like form. The cross-bar of said outer frame extends outwardthrough vertical slots s s" in the uprights of the frame A, andthe upperends of the uprights of said outer frame, which are articulated to itssaid cross-bar, work in housings h, bolted to said uprights of the frameA externally, and each is provided at this point with a cam-recess, Fig.3, to receive at times and coact with a tappet projection, i

on the corresponding jaw; and a central vertical thrust bar, T, slidingthrough said sill of the inner frame, I, is coupled to the cross-barofsaid outer frame, 0, for transmitting motion through the latter to thejaws. A spring,

IOO

S at the back of each jaw, suitably-accommodated and coupled to thejaw,as indicated in Fig. 3, provides for retracting the jaw when said outerframe is reelevated. Said thrust-bar T receives its said motion fromjthemandrel-slide, in the downstrokes of the lat ter, through the mandreland link-blank, as illustrated by dotted linesin Fig. 3. This device isfurther utilized to cushion said downstrokes of the mandrel-slide bycombining IIO therewith a spring or springs, S, interposed Y betweensaid cross-bar of the outer frame, 0, and a parallel snb-sill, 8*. Oneor more springs of any approved form may be used. A hand-lever, H", alsocoupled centrally to said cross-bar, pivoted at its right-hand end,

and accommodated at its left-hand end by a vertical slot, 8, Fig. 6, inthe left'hand upright of the frame A, provides, with the aid of saidcushioning-springs S, for partially reelevating said outer frame,thrust-bar, link-J blank, and mandrel by hand, as illustrated by Fig. 5,after the endlapping and welding operations illustrated by Fig. 4.

The end-lapping and welding devices consist of a drophammer, H, workingin said ways w in the frame A above themandrelslide, and having a longrod, R, by which it is connected with a piston in a steam-cylinderabove, or other approved means for working the same in customary manner,and a pair of lateral tappetslides, T T, a' pair of 1evers,-L L, and apair of horizontal lappingpushers, P P, with a retracting-spring, S anda guide-housing for each pusher, and other appurtenances, as indicated,said hammer having grooved cam-edges e, to coact with said tappetslidesT T successively during each descent thereof, as illustrated.andhereinafter set forth; and the lower end of the hammer and the inner endof each pusher are shaped correspondingly with the uppermandrel-section, m, which possesses additionally the functions of ananvil in the end lapping and welding operations.

For making links from round rod iron or steel, for' which the machine isspecially designed, the upper and lower ends of the mandrel m m, theperipheries of the feed-rollers f f, the inner surfaces of the clampjawsJ J, and the effective concavity in the lower end of the 'hammer H areappropriately grooved, as

shown, so as to preserve the shape of the metal in cross-section and tofacilitate guiding it. In a machine for working up square bar-iron intolinks such grooves would be omitted. I

For finishing the link after it has been reelevated by hand, asaforesaid, and as illus-' trated by Fig. 5, a last setof devices isemployed, the operation of which is illustrated by Fig. 6, as aforesaid.These are a pair of horizontal finishinghammers, H H, located centrallyfront andrear, and working in housings'h h, a pair of levers orrock-frames, R R, coupled at their upper ends to the hammers, and a pairof crank-shafts, O C, for oscillating said rock-frames, with crank-disksD'D, fast on the right-hand ends of said crankshafts, an intermediatecrank-disk, D, on a i stud-shaft projecting from the right-hand uprightof the frame A, a rod, R, connecting the wrist-pins of said disks, 2.driving-band,

F, Fig. '1, embracing said disk D, which forms a pulley, a loosedriving-pulley, E, on said driving-shaft D, and a hand-lever fork, H,for clutching and unclutching said pulley E with and from afast pulley,P, through which said shaft D receives its motion, said pulleys havinginterlocking clutch projectwooperators take their positions at theretions, as shown. Said pulley P being connected, directly orindirectly, with a steamengine or other motor in motion, and saidhaniiiier-rod R- depending from the cylinder of :a suitable drop-press,for example, in

working condition, the machine belted and in a state of rest, as shownin Figs. 1 and 2, is ready for work.

Provision having been made for a rapid supply of straight blanks Z, Fig.1, cut of suitable length, with properly-scarfed ends, and each soheated that its ends are at or slightly above welding-heat and itsmiddle a dull red,

I spective sides of the machine and the operation proceeds as follows:The man at the right thrusts a heated straight blank, Z, upon thefeed-rollers f, beneath the elevated mandrel m m", as seen in Fig. 1,with its scarfs' 'l'ipand down, and, drawing back, pulls the hand-leverH, which instantaneously forces in the tappet-slide T, and through thelever L, slide-bar S, and fork F throws the clutch- 7Q slide 0 into meshwith the rotating loose pulley L, as shown in full lines in Fig. 3. 'Theshaft M now makes a half-turn with said pulleyL, and through saidcrank-wheel W,pitman P, and mandrel-slide S, draws the mandrel m in inan instantinto the position and expanded condition represented in dottedlines in Fig.3, and therewith the link-blank l, now reduced to U shape.Bending to this shape is mainly accomplished when the parts reachhalf-stroke,

as represented in full lines in Fig. 3, and is effected to this extentby the coaction of the lower mandrel-section, m, the feed-rollers ff,and the upper ends of the open jaws J J.

To and for a short distance below half-stroke t the upper part of themandrelslide S moves with the remainder by its own gravity. The lowerends of the guides to arrest it in proper position for the end lappingand welding operat-ions represented by Fig. 4, and during the 0completion of the stroke the slide and mandrel open to the extentrepresented in Fig. 9

'and in dotted lines inFig. 3. Immediately before the completion of thestroke the lower bend of the link comes in contact with the 5 thrust-barT, and as the stroke is completed motion is thus transmitted from themandrelslide to the sliding frame 0, which, by its camrecesses c c andthe tappet projections 19' i on the jaws J, presses the latter againstthe sides of the mandreland clamps the bentlink-blank tightlypreparatory to the said end lapping and welding operations. Theretractingsprings S are put in tension, moreover, the cushioning-springsS are compressed, and the l e-elevating hand-lever H, Figs. 1' and 5, isleft in its lowermost position. Finally, at the conclusion of the strokethe cross-head X comes inv contact with said tappet-slide T, and by itscoacting cam-surface a, through said tappetslide T, lever L, slide-barS, and fork Ff,

unclutches the clutch-slide C, as represented by dotted lines in Fig. 3,and stops the machine. The hammer H is now dropped,with the end lappingand welding effects illustrated by Fig. 4. The descending hammer firstacts on the upper tappet-slide, T, and through this i and the lever Lactuates the left-hand end lapping pusher, P, and thereby bends overthe'left-hand end of the linkblank l, as shown in full lines in thefigure. A moment later, as

represented by broken lines, the hammer H the lapped ends together andsecurely welds them. The hammer H is at once re-elevated,

which restores the upper part of the machine to normal condition. Theman on the 5 left-hand side of the machine now raises said hand'lever H,assisted by said springs S, and thereby partially re-elevates saidsliding frame 0 and thrust-bar T, elevating therewith the welded link Z,and with the latter, of necessity, the lower part of the mandrelslide,lifting the weld end of the link above and clear of said mandrelsectionm, and so that the edges of the weld are in line with thefinishing-hammers H H, as illustrated by Fig.

6. The man on the right-hand side of the machine now moves thehand-lever H so as to clutch the pulley E with the driving-pulley P, andmotion isimmediatelytransmitted,through the band F, pulley-disk D, rodR, and disks D D, to the front and rear crank-shafts, U0, and therefrom,through the rock-frames R R, to the front and rear finishing-hammers,HH, causing them to strike the weld'edges simultaneously and drive inany fins or swells formed thereon at the welding operation. A reversemovement of said hand-lever H by I the same man unclutches said pulley Eand stops the finishing-hammers, which are made to rest in retractedposition, as shown in Figs. 2 and 7. Finally, the man on the left-handside of the machine pulls the hand-lever H", which, forcing in thetappet-slide T", actuates the fork F", and theret-hrough throws the clutchslide O into mesh with the loose driving-pulley L and causes themain shaft M to be started again. This, through said crankwheel W and ipitman P, fully re-elevates the mandrel-slide, the mandrel collapsing asit rises to the point hereinbefore indicated, after which theanvilsection in of the mandrel again comes into contact with the upperend of the link and lifts the finished link l between the retracted jawsJ J to the position in which it is represented in Fig. 7, where it hangsloosely upon the mandrel, as indicated. The mandrel is now in itsuppermost position, as aforesaid, and is here stopped automatically bythe coaction of said cross-head X with said tappet-slide T the latter,through said fork F", retracting said clutchslide U and restoring themachine to its condition of rest. The man on the lefthand side nowremoves the finished link from the machine while the man on theright-hand side introduces another straight blank, and thus theoperation proceeds. I have described somewhat in detail my machine asshown in the drawings, which illustrate the best means now known to mefor producing the effects and carrying out the modes of operation of myinvention, apart .from mechanical details of construction, ad-

justing devices, and the like, which I have not 1 considered itnecessary to represent, as they .form no part of this invention, and themachine admits of numerous modifications in i form and arrangement ofparts, and the em- .,ployment of known mechanical substitutes within thescope of my invention, as hereinafter claimed.

Having thus described my said improvement in machines for bending andwelding links, I claim as my invention and desire to patent under thisspecification-- 1. The combination of the loose drivingpulley L,clutch-slide G", shaft M, crank-wheel WV, pitman P, and verticalmandrel-slide S, the latter carrying a bendingunandrel on its face, withthe horizontal feed-rollers ff, and

the open jaws J J, below said rollers. substantially as hereinspecified, for bending astraight link-blank to U shape, in the mannerset forth.

2. The combination of the vertical mandrelslide S, carrying abending-mandrel on its face, the vertical thrustloar T, the slidingframe 0, having canrrecesses in its uprights, and the jaws JJ, pivotedat their lower ends and having tappet projections engaging with saidcamrecesses, substantially as herein specified, for clamping the bentlink-blank laterally, in the manner set forth.

3. The combination of the drop-hammer H, tappet-slides T T, levers L L,and pnshers P P, with their appurtenances, and the upper part of thevertical niandrel'slide S, supported by its ways beneath said hammer,and having an anvil-section of the bending-mandrel upon its face,substantially as herein specified, for lapping the ends of thelinkblank, one over or upon the other, and welding them together, in themanner set forth.

4. The combination of the hand-lever H,

sliding frame 0, thrust-bar T, and cushioningspring S, with the lateraljaws J J, and vertir.

cal mandrel-slide S, substantially as herein specified, for looseningand partially re-elevating the welded link, in the manner set forth.

5. The combination of the parallel 'cra'nkshafts G 0, rock-frames R R,and finishinghammers H H, with a driving-shaft, clutch, band andpulleys, and connecting-gear for driving said crank-shaftssimultaneously at will, substantially as herein specified, for finishingthe links, in the manner set forth.

6. The combination of the loose drivingpulley L, clutchslide C shaft M,crank-wheel- \V, pitman P, and vertical mandrel-slide, S,

the latter having on its face a vertically-collapsing mandrel, the uppersection of which carries the finished link upward and supports itloosely until it is taken from the machine, substantially as hereinspecified.

7. The combination, in an upright machine for bending and welding links,of a horizontal pair of feed-rollers, a vertical mandrel-slide carryinga combined bending-mandrel and anvil on its face, and a pair ofclamping-jaws for bending a straight link-blank to U shape, and holdingit tightly in this shape, with a pair of end-lapping pnshers and aweldinghammer, substantially as herein specified, for

making a lap-weld link, in the manner set welding links, thecombination, witha vertical mandrel-slide, of the cross-head X,tappetslide T, fork F, and clutch-slide C, substantially as specified,for automatically unclutching the shaft which drives said mandrel-slidefrom its driving-pulley at the end of each bending-stroke, in the mannerset forth.

9. In an upright machine for bending and welding links, the combination,with a vertical mandrel-slide, of the cross-head X, tappetslide T", forkF", and clutch-slide O", substantially as specified, for automaticallyunclntching the shaft which drives said mandrel-slide from itsdriving-pulley at the end of each return-stroke, in the manner setforth.

10. In a machine for bending and welding links, a combined mandrel andanvil carried by a two-part slide, and itself divided transversely,substantially as herein specified, the

bending-section of the mandrel being adapted 20 JAMES I. OHEESMAN.

Witnesses:

LEVI CLABAUGH, MICHAEL SoHENoK.

